Isolated showers and thunderstorms are expected Friday, according to the National Weather Service, with heavier rainfall in the forecast for Saturday.

Tuesday, bringing with it about a 40% chance of showers and storms, but finally some cooler fall temperatures.

Houston is bracing for the worst as forecasters warn of strong storms and severe weather expected to pound the city Friday night, bringing the threat of heavy rain, lightning, and potential flooding through Saturday morning.

The National Weather Service (NWS) has issued a series of weather alerts for Houston and surrounding counties, urging residents to prepare for heavy rainfall, flash flooding, and the likelihood of severe thunderstorms over the weekend.

Another round of storms will move through southeast Texas this evening. Due to that threat, a flood watch continues until early Sunday.

The City of Houston’s Office of Emergency Management told KHOU 11 that Houston Public Works crews are staging barricades at 49 flood-prone locations across the city. At Memorial Drive and Waugh Drive, barricades are already in place in case they are needed.

Houston and the rest of Southeast Texas are about to receive their biggest dose of rain in more than a month this weekend, according to the National Weather Service. Here are five big questions and what to keep in mind before the storms roll in and the puddles start to grow.

Wednesday afternoon will become sunny, warm in the mid-80s. We're so expecting some heavy rain this weekend to help wet the ground.

Ahead of the system, Houston Public Works will lower the water level of Lake Houston, beginning at noon Friday. In all, the lake will be lowered by 12 inches, bringing it to an elevation of 41.4 feet. If you live along Lake Houston, the city wants you to secure property along the shoreline.